Organometallic reactions. Part VII. Further addition reactions of tributyltin methoxide and of bistributyltin oxide

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Abstract
The addition of tributyltin methoxide and of biotributyltin oxide to the following acceptor molecules is described : isothiocyanates, trichloroacetonitrile, carbon disulphide, carbon dioxide, sulphur dioxide, and carbodi-imides. The corresponding phenoxide is generally less reactive than the methoxide. The initial product is always a 1 : 1 adduct, but in the reaction of bistributyltin oxide with isothiocyanates and with carbon disulphide, the nature of the ultimate product is determined by the elimination of bistributyltin sulphide. Many of the adducts dissociate when heated. Many react very readily with protic reagents, and consequently organotin compounds catalyse the addition of alcohols or of water to carbodi-imides.

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